import sys, os.path, tempfile, shutil

from unittest import TestCase

class BrokenTests(TestCase):
    def mktemp(self):
        MAX_FILENAME = 32 # some platforms limit lengths of filenames
        base = os.path.join(self.__class__.__module__[:MAX_FILENAME],
                            self.__class__.__name__[:MAX_FILENAME],
                            self._testMethodName[:MAX_FILENAME])
        if not os.path.exists(base):
            os.makedirs(base)
        dirname = tempfile.mkdtemp('', '', base)
        return os.path.join(dirname, 'temp')


    def test_renamedSource(self):
        packagePath = os.path.join(self.mktemp().encode('ascii'), b'twisted_private_helper')
        os.makedirs(packagePath)
        with open(os.path.join(packagePath, b'__init__.py'), 'wb') as f:
            f.write(b'')
        with open(os.path.join(packagePath, b'module.py'), 'wb') as f:
            f.write(b'''
import warnings
def foo():
    warnings.warn("oh no")
''')

        pathEntry = os.path.dirname(packagePath.decode('ascii'))
        sys.path.insert(0, pathEntry)

        # Import it to cause pycs to be generated
        from twisted_private_helper import module

        # Clean up the state resulting from that import; we're not going to use
        # this module, so it should go away.
        del sys.modules['twisted_private_helper']
        del sys.modules[module.__name__]

        # Rename the source directory
        shutil.move(packagePath, os.path.join(os.path.split(packagePath)[0], b'twisted_renamed_helper'))

        # Import the newly renamed version
        path = sys.path[:]
        contents = list(os.walk(path[0]))
        modules = sys.modules.copy()
        try:
            from twisted_renamed_helper import module
        except ImportError as e:
            import pdb; pdb.set_trace()
            print(e)
            raise